Characterization the microstructure and defects of matrix graphite irradiated with Xe ions

doi:10.1016/j.nimb.2017.03.159

CAS OpenIR > 中科院上海应用物理研究所2011-2018年

	Characterization the microstructure and defects of matrix graphite irradiated with Xe ions
	Xu, HX; Lin, J; Li, JJ; Zhu, ZY; Zeng, GL; Liu, JD; Gu, BC; Liu, B
	2017
Source Publication	NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN	0168-583X
Volume	406 Issue:-Pages:638-642
Subtype	期刊论文
Abstract	The matrix graphite of pebble fuel elements was irradiated with 1 MeV Xe ions at room temperature to fluences of 5.8 x 10(14) ions/cm(2) and 2.9 x 10(15) ions/cm(2), respectively. The microstructure and defects of matrix graphite samples were characterized by using scanning electron microscopy (SEM), Raman spectroscopy and slow positron beam techniques. The SEM result reveals that hundred-nanometer sized pores appear at the surface after irradiation and the density of pore increases with fluence. Raman results show that D peak (1350 cm(-1)) and G peak (1580 cm(-1)) are broadened after irradiation. In addition, the G peak position shifts from 1580 cm(-1) to 1560 cm(-1) with the linewidth increases from 21 cm(-1) to 132 cm(-1), corresponding to the increase in bond-angle disorder as the matrix graphite transforms from microcrystalline to amorphous carbon(a-C). The slow positron beam study shows that the defects trapped positron S parameter increases with fluence, suggesting that the vacancy-type defects concentration or size of open volume defects increases. The analysis of Raman and slow positron beam consistently conclude that the reason for the phase transition after irradiation is the increase in irradiation-induced vacancy defects accompanied by the overlap of disordered regions. (C) 2017 Elsevier B.V. All rights reserved.
Keyword	Neutron-irradiation Carbon Beam
DOI	10.1016/j.nimb.2017.03.159
WOS Keyword	NEUTRON-IRRADIATION ; CARBON ; BEAM
Indexed By	SCI
Language	英语
WOS ID	WOS:000407659500045
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/28575
Collection	中科院上海应用物理研究所2011-2018年
Recommended Citation GB/T 7714	Xu, HX,Lin, J,Li, JJ,et al. Characterization the microstructure and defects of matrix graphite irradiated with Xe ions[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,2017,406(-):638-642.
APA	Xu, HX.,Lin, J.,Li, JJ.,Zhu, ZY.,Zeng, GL.,...&Liu, B.(2017).Characterization the microstructure and defects of matrix graphite irradiated with Xe ions.NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS,406(-),638-642.
MLA	Xu, HX,et al."Characterization the microstructure and defects of matrix graphite irradiated with Xe ions".NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS 406.-(2017):638-642.

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